# Suburban Sputtering Uphill

**URL:** <https://community.cartalk.com/t/suburban-sputtering-uphill/57857>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, suburban\
**Created:** [November 22, 2010, 3:21am UTC](https://community.cartalk.com/t/suburban-sputtering-uphill/57857 "2010-11-22T03:21:48Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Suburbasaurus](https://avatars.discourse-cdn.com/v4/letter/s/839c29/32.png) [@Suburbasaurus](https://community.cartalk.com/u/Suburbasaurus)\
**Post date:** [November 22, 2010, 3:21am UTC](https://community.cartalk.com/t/suburban-sputtering-uphill/57857/1 "2010-11-22T03:21:48Z")

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My 1999 Suburban K1500 is sputtering uphill. Already replaced: fuel filter, air filter, plugs, wires, pcv, distributor. This took care of engine misfire codes. No error codes for the last two months, but it’s a lousy ride uphill on the highway at 20mph. O2 sensors next?

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**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\
**Post date:** [November 22, 2010, 3:32am UTC](https://community.cartalk.com/t/suburban-sputtering-uphill/57857/2 "2010-11-22T03:32:35Z")

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Check fuel pressure. There should be a fitting on the fuel rail…

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**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\
**Post date:** [November 22, 2010, 3:42am UTC](https://community.cartalk.com/t/suburban-sputtering-uphill/57857/3 "2010-11-22T03:42:39Z")

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If the fuel pressure is correct you might also consider the possibility of clogged converters amd this could be caused by age and poor running.

This can be easily checked with a vacuum gauge.